Slice the cucumber very thinly and put in a bowl. Barely cover with vinegar. Chop up garlic and dill (if using fresh dill). Combine garlic, dill, garlic, salt, and sugar (to taste) with the cucumber and vinegar. The amount of sugar you use depends on how sweet (use more) or vinegary (use less) you want your pickles. The pickles will be ready in as little as an hour, but they are best if you let them sit overnight in the fridge.